By Karen Klinka For The OklahomanAn oil painting of a crystalline, alpine lake nestled in a beautiful valley surrounded by steep rocky mountain peaks won the 2015 Prix de West Purchase Award on Saturday at the National Cowboy & Western Heritage Museum. “The Lake of Glass,” priced at $18,000 and painted by Andrew Peters, 60, of Council Bluffs, Iowa, will be bought by the museum to be part of its permanent collection.Read more on NewsOK.com